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P. REILLY.

I STEAM BOILER. .7 N0. 359.81 4. Patented Mar. 22, 1887.

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P. REILLY.

V STEAM BOILER.

Patented Mar. 22, 1887.

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UNITED STATES PATET tries.

PATRICK REILLY, OF BROOKLYN, NEXV YORK.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 359,814, dated March 22, 1887,

Application filed September 15. 1886. Serial No. 213,556. (No model.)

To (1% whom it may concern.-

Be it known that I, PATRICK REILLY, a citizen of the United States, and a resident of Brooklyn, county of Kings, State of New York, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

This invention has for its object to increase the heating and steam-generating capacity of steam-boilers by adding thereto a system of outside pipes arranged within the heating space of the boiler, and so connected to the body of the boiler as to constitute a circulatori'or the water.

The invention consists of headers or upright tubes joined to the body of the boiler at its front and rear ends above and below the waterline,and a series of pipesconnecting each of the fronthcaders to one of the rear headers. These said series of pipes consist of side and end pieces connected together by elbow-j oints. The connections of the headers with the boilers is made by means of a system of elbow-joints, which, with the elbow-joints of the side pipes, allows for unequal expansion and contraction of the various parts, and prevents all injury likely to arise therefrom; but to describe my invention more particularly I will now refer to the accompanying drawings, in which- Figure 1, Sheet 1, is a side elevation of my improvements in boilers. Fig. 2, Sheet 1, is a plan View; Fig. 3, Sheet 2, a rear elevation; and Fig. a, Sheet 2, a front elevation, the furnace-walls in all the views being shown in section.

The boiler a, to which my improvements are shown applied in the drawings, is of the retnrn-tube cylindrical class set in brick-work, with the grate I) at its front end, in the ordinary way. At the four corners of the brickwork of the boiler a are placed the headers or upright tubes 0 c d d, which are connected togethcr in pairs by series of side and rear pipes, the front header, 0, to its diagonally-located rear header, (1, by the connecting-pipes formed of two parts, eand e, joined together by elbow- The said parts 6 pass between the boiler and the other rear header, (1, in close proximity to the rear of the boiler. The front header, 0'. is joined to its diagonally-located header (1 by the connecting-pipes formed of the two parts f and f,fastened together by elbow-j oints f which are outside the header (2. The parts 6 and f have right and left hand screw-threads, to enable them to be readily placed between the elbows e and f' and the headers d and d. The front headers, c and c, are connected at their upper and lower ends to the front head of the boiler by the pipeconnections 9 and y and h and h, respectively,

and they are set permanently in the front brick-work.

To enable the rear headers, dand d, to move slightly to accommodate for variations in expansion andcontraction of the side pipes, e andf, and body of the boiler a, I join them to the rear end plate of the boiler by four-bend connections, thus providing perfect universal connections therefor, the play necessary to allow for any disturbance that may occur taking place in the screw-joints of these fourbend connections.

The headers d and d are connected to the lower part of the rear head near its center by the four-bend connections composed of the elbows i and j, fastened to the headers by nipples, the elbows i and j, fastened to i andj by thehorizontal right and left hand screw-th read pipes i and f, the elbows t1 and j connected to i and j by short pipes, and the elbows i and j connected to t and j by vertical pipes. t andj and to theboiler by nipples. A similar arrangement of elbows and pipes, 75 k k k k k and Z Z Z" Z 1* P. connect the upper ends of the headers (l and d to the steam-space of the boiler. Each one of the headers is provided with a blow-off cock, at, applied in the usual manner. By this arrangement of pipes and headers a free circulation of the water from the boiler is well provided for, and their heating capacity added to that of the boiler without calling for further expenditure of fuel, and the steam generated in the pipes passes directly into the steainspace of the boiler.

\Vater is fed to the boiler in the usual manner. I

Another advantage due to this system for more fully utilizing the heat generated in boiler-furnaces is that the water in the boiler is kept constantly in circulation, and the deposit of scale and mud prevented from occurring in the body of the boiler, the same taking place .in the headers, the mud generally being precipitated in the rear headers, d and d,

IOC

and the scale deposited in the front headers, c and c, and the whole system may be kept perfectly clean by' frequent use of the blow-off cocks m.

I do not broadly claim the combinatiomwith a steam-boiler, of pipes connected thereto and located in the heatingspace of the boiler, as I am aware that pipes and coils haveheretofore been so applied to act as feed-water heaters.

My arrangement of pipes has no connection with the water-supply other than in. providing for a circulation of the water after it has en? tered the boiler, and that, too, in a far more perfect manner than previous devices of similar construction by reason of said pipes being connected both at their front and rear ends to the water and steam spaces of the boiler.

Instead of the pipes being connected together by screw-joints, as shown, some or all of them may be joined by flangejoiuts.

Having now described the nature of my invention and the mannerin which it is applied, whatI claim, and desire to secure by Letters Patent, is

1. The combination, with a steam-boiler, of an auxiliary heater and water-circulator consisting of vertical headers, each connected to the water-space and steanrspace of the boiler, and a series of pipes connecting each of the front headers to one of the rear headers, substantial] y as and for the purpose set forth.

2. In combination, a steam-boiler, four vertical headers, one located at each corner of the boiler and connected thereto both above and below the water-line, and two series of pipes rear of the boiler, and connectedtothe diagonally-located headers, substantially as and for the purpose set forth.

3. Incombination, a steam-boiler, two vertical headers connected at their lower ends to the waterspaoe and at their upper ends to the steam-space at the front endof the boiler, two

series of pipes secured to these heads passing along the sides and around the rearend of the boiler, two rear headers secured to the ends of i each series of pipes, and four elbow-jointed PATRICK REILLY.

In presence of- ALFRED SHEDLOCK, H. D. XVILLIAMs.

35 arranged in the heating-space at the sides and 

